Quick question. I have just picked up a 75 mini with an MG Metro 1275 A+ engine. It is running an HS4 carb that I have cleaned and tuned but it is a bit down on power. I will be putting on an LCB header, exhaust and intake manifold shortly but will be keeping the carb until I can save up for an HIF44.
In the mean time, I am wondering if anyone here has any experience/advice on a good setup for needle and spring to run in the HS4 to make the most of the current setup.
cheers